105991254 has 36 divisors (see below), whose sum is σ = 238664244. Its totient is φ = 35254764.

The previous prime is 105991241. The next prime is 105991261. The reversal of 105991254 is 452199501.

105991254 is a `hidden beast` number, since 1 + 0 + 599 + 12 + 54 = 666.

It is a super-2 number, since 2×105991254² = 22468291848985032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 226729 + ... + 227195.

Almost surely, 2^105991254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 105991254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119332122).

105991254 is an abundant number, since it is smaller than the sum of its proper divisors (132672990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105991254 is an frugal number, since it uses more digits than its factorization.

105991254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 105991254 is about 10295.2053889177. The cubic root of 105991254 is about 473.2493325555.

The spelling of 105991254 in words is "one hundred five million, nine hundred ninety-one thousand, two hundred fifty-four".